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Mechanical properties
3.5 Service and inspection intervals
Risk of electric shock as a result of residual voltages
There is a risk of electric shock if hazardous residual voltages are present at the motor
connections. Even after switching off the power supply, active motor parts can have a
charge exceeding 60 μC. In addition, even after withdrawing the connector 1 s after
switching off the voltage, more than 60 V can be present at the free cable ends.
• Wait for the discharge time to elapse.
The motors have been designed for a long service life. Carefully ensure that maintenance
work is correctly performed, e.g. removing chips and particles from the air gap.
For safety reasons it is not permissible to repair the motors:
Risk of injury when changing safety-relevant motor properties
Changing safety-relevant motor properties may result in death, serious injury and/or
material damage.
Examples of changed safety-relevant motor properties:
Damaged insulation does not protect against arcing. There is a risk of electric shock!
Damaged sealing no longer guarantees protection against shock, ingress of foreign
bodies and water, which is specified as IP degree of protection on the rating plate.
Diminished heat dissipation can result in the motor being prematurely shut down and in
machine downtime.
• Do not open the motor.
Note
If incorrect changes or corrective maintenance are carried out by you or a third party on
the contractual objects, then for these and the consequential damages, no claims can be
made against Siemens regarding personal injury or material damage.
Siemens service centers are available to answer any questions you may have. Siemens
Service Center addresses can be found at
http://www.siemens.com/automation/service&support
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WARNING
WARNING
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
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